2181477253 has 2 divisors, whose sum is σ = 2181477254. Its totient is φ = 2181477252.

The previous prime is 2181477211. The next prime is 2181477307. The reversal of 2181477253 is 3527741812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1881564129 + 299913124 = 43377^2 + 17318^2 .

It is a cyclic number.

It is not a de Polignac number, because 2181477253 - 2⁹ = 2181476741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2181427253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090738626 + 1090738627.

It is an arithmetic number, because the mean of its divisors is an integer number (1090738627).

Almost surely, 2^2181477253 is an apocalyptic number.

It is an amenable number.

2181477253 is a deficient number, since it is larger than the sum of its proper divisors (1).

2181477253 is an equidigital number, since it uses as much as digits as its factorization.

2181477253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 40.

The square root of 2181477253 is about 46706.2870821477. The cubic root of 2181477253 is about 1296.9310750558.

The spelling of 2181477253 in words is "two billion, one hundred eighty-one million, four hundred seventy-seven thousand, two hundred fifty-three".